Drilling rig



March 7, 1944. E. 1 ALEXANDER ET A1. 2,343,517

DRILLING RIG 1 Filed Feb. 28,` 1941 4 sheets-sheet 1 Mardi 7, 1944- E. 1 ALI-:XANDR ET AL 2,343,517

DRILLING RIG Filed Feb. 28, 1941 4 sheets-sheet 2 March 7, 1944; E. l.; ALEXANDER ET Al.. *2,343,517

` DRILLING RIG Filed Feb. 28, 1941 Y 4 Sheets-Sheet 5 AN l il i ATTOR'NEY March 7, 1944. E. ALEXANDER ErAL 2,343,517

DRILLING RIG 4 Sheets-Sheet 4 Filed Feb. 28, 19541 ATTORNEY of the truck.

Patented Mar. il

Eett Lee Alexandre Waite, Enid, Okla.,

Failing Supply'Company, ration of klahoma :and Albert vv. Brauhassigners to The George E.

Enid, kla., a corpo- Appucaaon' February 2s, 1941, serial No. 381,057

(ou zes-19) Claims.

This invention relates to portable 'drilling rigs,

particularly to the'draw-works and rotary table driving mechanism thereof, and has for its principal objects to provide a compact, light weight construction, and to iin' better manipulation of the drilling operaons.

Other objects of the invention are to provide the rotary table operating mechanism with a brake for controlling actuation thereof when the driving clutch is disengaged; to provide' a simple power transmission for connecting the power with the various operating mechanisms of the drilling rig; to provide, a. vflexible driving connection between the power transmitting mechanism provide controls arranged andthe winding drum; and to provide a clutch for disconnecting the exible driving connection from the power when the rotary is actuated thereby, so as to relieve the exible driving connection and winding drum mechanism from vibrations and back-thrusts' incidental to actuation of the drilling string.

In accomplishing these and other objects of the invention, as hereinafter pointed out, we have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawings, wherein:

Fig. 1 is a side elevational view of a portable drilling rig equipped with a draw-works em bodying the features of the present invention,

a. part of the truck frame and platform being broken away to btter illustrate the driving connection between the draw-works and the motor Fig. 2 is a longitudinau section through the, draw-Works on the line 2 2 of Fig.v3. t

Fig. 3 is a horizontal section through the lower- I portion of the draw-works on the line' 3-3 of Fig.

2, particularly illustrating the power transmission.

Fig'. 4 `is a fragmentary vertical section on the une 4 4 of Fig. 5.

Fig. 5 -is a cross-section on the line 5 5 of u Fis. a

Fig. 6 is a detail perspective view of the brake vand clutch control for controlling actuation of cludes a truck 2, having an engine for operatingv the truck and which is adapted toactuate the the drilling rig. The flexible connection 3 may be connected with the transmission through a suitable power take-oil, or it may be connected with a section of the propeller shaft 5 which drives the rear-'wheels 6 of the truck. Mounted on the frame of .the truck is a platform l, which supports the drilling equipment including a tower -8, a rotary turntable 9, a draw-works ill and other drilling mechanism (not shown), the ,present invention being directed to the draw-works I0 and associated mechanism.

The draw-works -IIJ is constructed in accordance with the present invention, land includes a substantially rectangular base frame comprising longitudinal sills Il and I2, connected by transverse end sills |3 and I4 and an intermediate sill I5. Supported on the sills II` and l2 of the base frame, substantially midway the length thereof, are upright members IS, which are connected at their upper ends with therear ends of the longitudinal sills by brace members l1, the uprights I6 being interconnected by a cross-member I8 to provide the mainA supporting-frame for a winding drum I9 anda sandreel 20, later described.

Also supported by the base frame, in covering relation therewith, is 'a housing 2l covering the draw-works and the driving connections with the 22. shaft 23, having its ends suitably journalled in bearings carried on the rear sider of the upright vI 6 near the upper ends thereof. Connected with the shaft 23 is a sprocket 24 for driving the shaft, as later described. .4 Y

The winding drum i9 ls rotatably mounted on a shaft 25, having its ends journalled in bearings carried by the brace members. l?, andl is adapted to be connected'with the shaft by a .clutch 26, located at one end -oi the winding drum, as shown in Fig. 5. The winding drum shaft 25 is actuated by a sprocket 21 xed thereto at a point in alignment with the sprocket 2li, the sprockets being interconnected by a iierdble driving'member, such as a chain An which passes over a sprocket 29 on a line shaft 30. z

sills of the base frame', as best shown in Figs. 3 and 5. The sprocket 29 is loosely'mounted on-tbe line shaft. but is adapted to be connected therewith by.a clutch collar 34, having teeth 35 engageable with teeth 36 on the hub of the sprocket, the collar being slidably secured to the shaft by splines 31. The collar is shifted by means of a shipper yoke 38, which is pivotally supported lon a bracket 39 located below the line shaft 30. The yoke includes an upwardly extending arm 40 that is connected by a link 4|. terminating in a fiat head 42 which projects through a slot 43 in a side of the housing, the head being provided with a handle 44 whereby the link 4| is adapted to be shifted to move the clutch into and out of engagement with the sprocket, the head 42 bein: provided with notches 45 and 4,8 which engage the lower edge of the slot 43 to hold the clutch collar in one or the other of its respective positions. The driving chain is provided with a tightener, including an idler sprocket 41 adjustably supported from the cross-member |8 by a bracket 48, Fig. 4.

Mounted on the line shaft 30 is a gear` casini;r 49, the sides of the gear casing being provided with suitable antifriction bearings 50 and 5|. Located within the gear casing, and xed to the line shaft by means of a spline 52, is a bevel gear 53, having meshing engagement with a drive pinion 54 that is fixed to a stub-shaft 55 supported in thrust bearings 5'6 and 51 at the forward portion of the gear casing, as shown in Fig. 3. The stub-shaft 55 'extends into a gear case 58V that is supported from the gear casing 49 by means of a bracket 59, which also cooperates with the gear casing in mounting the thrust bearings 56 and 51.

spur gear 6|, which meshes with a spur gear 82 that is rotatably mounted on the shaft 4.

The shaft 4 is mounted in suitable antifriction bearings 63 and 64 carried in the lower portion of the gear case, as. shown in Fig. 2, the shaft 4 being connected by a universal joint 65 with the flexible connection 3. Splined on the shaft 4 is a clutch collar 68, having teeth 61 adapted to mesh with similar teeth 88 on the hub of the gear4 62. The clutch collar is actuated by a shipper yoke 89 which is manipulated by a shift rod 10.

The shaft 55 projects forwardly from the gear case and carries the bowl member 1| of a friction clutch 12. The clutch, in the illustrated instance, includes interengaged plates 13 having connection with the bowl member, and which are connected in. driving relation with plates 14 on the complementary clutch member 15 by means of a pressure plate 18 that is operated by a toggle connection 11 with a shifting collar 18, the clutchl member 15 and clutch collar being splined on a shaft 19 that has one end journalled in an antifriction bearing 80 located in the hub 8| of the bowl member. The opposite end of the shaft is rotatably mounted in a bearing 82 supported on a sub-frame, laterI described. The shaft 19 is connected with the shaft 22 through a brakedrum 88 and a flanged collar 84,'the brake-drum being splined to a projecting end 85 of the shaft 18, and the flange collar being splined to the shaft 22, the collar and drum being interconnected by fastening devices, such as-cap-screws I8, shown in Fig. 2. Y

The sub-frame 81 includes side rails -88 and I9 that are connected at their front ends with A arms 90 and 8| extending laterally from the lower portion of the gear casing 48 so that theA front end of the sub-frame is suspendingly supported from the shaft 88. The forward ends of the. rails Located in the gear case 58m and fixed on the stub-shaft by a spline 60,

extend parallel with the shafts and are connected below the bearing 82 with a cross-rail 82. The cross-rail 92 carries ears 93 at the ends thereof, which are connected by links 94 with ears on the platform frame of the truck, as shown in Figs. 2 and 3. With this construction the sub-frame is flexibly mounted so as to compensate for torsional strains produced in the platform and chassis frame of the drilling rig. The specific mounting of the sub-frame forms no part of the present invention, this structure being covered in co-pending application Serial No. 381,056, filed February -28, 1941, and which has matured into Patent No. 2,278,606, dated April 7, 1942.

The brake includes a brake-band 98 which is normally engaged with the drum byfaprings 81 and 98, supported on a rod 99 and pressing against ears |00 on the terminal ends of the band, the ears being spread apart to release the band by a cam member |0I, pivotally mounted on a pin |02 that is carried on a bracket |08 which is mounted on the bearing 82, Figs. 2 and 3. The cam is pivoted by an arm |04 fixed thereto and having connection with the arm |05 of a rocker-arm |06 by a link |01. The rocker-arm vlill; is fated to a rock-shaft |08 journalled in bearings |09 and ||0 on the sub-frame 81 and located in alignment with the clutch collar 18. The clutch collar is actuated by the rock-shaft |08 through a yoke that is fixed to the shaft and has arms I2 engaging lateral pins I3 on the ring I I4 of the clutch collar. With this arrangement the brake is engaged when the clutch is disengaged and vice versa. 'I'he rocker-arm is connected by a link ||5 with the arm ||6 of a 1" lever H1, one arm of which is connected by a rod ||8 with a pedal IIS, and the other arm by a link |20 with a pedal |2I. The pedals ||9 and 2| are mounted on a shaft |22 which is journalled in bearings |23 and |24 attached to the side of the housing adjacent the drillers station. With this arrangement, the clutch is engaged and the brake-band'disengaged when the pedal |2| is depressed, and the clutch is disengaged and the brake engaged through reverse movement of the parts upon depressing the pedal H9.

The clutch for the winding drum is engaged and disengaged by a shipper yoke |25 that is pivoted to a bracket |28 on the side of the housing, and has a depending arm |21 which is connected by links |28 and |29 with arms |30 and |8|, the arm |30 being ilxed to a pedal |32 pivoted on the shaft |22, and the arm |3| `being fixed to a pedal |33 also pivoted on the shaft |22. Thus the winding drum is operatively connected with its shaft when one of the pedal levers is depressed, and disconnected when the other pedal lever is depressed.

When the drilling rig has been moved to a drilling location, the flexible connection 8 is connecd with the shaft 4 so that the draw-works is operated by the power of the truck engine. All of the clutches of the draw-works are initially disconnected so that the winding drum, sand ree/l and turntable of the rotary are idle. To render the line shaft 38 effective, the clutch collar 88 is engaged with the spur gear 82 so that the spur gear 82 rotates the gear 5| to actuate the stubshaft 55, which in turn actuates the bevelled gear 58 through the meshing pinion gear 54. The stubshaft 55 also eiIects rotation of the bowl mem'- ber 1|.

To actuate the winding drum shaft 25, the clutch collar 84 is engaged with the sprocket 28.

The sprocket 281s then effective in actuating the longitudinally of the vehicle below the drawworks, a line shaft extending transversely of the vehicle in substantially horizontal registry withsaid rotary shaft, a connecting shaft between the rotary shaft and the line shaft, a clutch coupling one end ofl the connecting shaft with the rotary table shaft, gearing connecting the other end of the connecting shaft with the line shaft, a drive shaft extending longitudinally of the vehicle below the line and connecting shafts, means connecting the drive shaft with the connecting shaft at a point between the clutch and said gearing `whereby power of said unit is applied intermediate the rotary table and the line shaft, a driving connection between the line shaft and winding drum including a clutch on the line shaft whereby the draw-works is adapted to be disengaged when the rst, named clutch is engaged to drive the rotary table, and a brake on the rotary table shaft for stopping rotation of the rotary table when the rst named m clutch is disengaged. 

